山西雷暴氣候特征及其背景場(chǎng)分析.pdf

1、南京信息工程大學(xué)碩士學(xué)位論文山西雷暴氣候特征及其背景場(chǎng)分析姓名：賈朝陽(yáng)申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：氣象學(xué)指導(dǎo)教師：王盤興李麗平20070101AbstractThespatialanomalymodesofthunderstorminShanXiprovinceandtherelationbetweenmodesandlargescaleCirculationareanalysedinemphasisonthebasiSofthebasal

2、climaticcharacteranalysiSofthunderstorminShanXiprovince。byusingthethunderstormobservationdataof69weatherstationfrom1971to2004inShanXiandtheNCEP／NCARreanalysisdataThemainresultsareasfollowsSeasonalchangecharacteristicofth

3、understormdayisextremelyobviousinShanxiprovinceThethunderstormmainlyoccursinMaytoSeptemberThereareobviousdifferencesindifferentmonths，JulyiSthemonthwiththehighestprobabilityofthunderstormdayIntherecentthirty—fouryears，th

4、eaccordantanomalyisthemostimportantmodeofspatialanomalyinShanXiandtheantiphasechangebetweensouthernandnorthernpartofShanXiiSalSOthesignificantmodeAgainstthesummerthunderstormanomaly。ShanXiprovincecouldbepartitionofftofou

5、rpartsInsummer，decreasingtendencyofthunderstormfrequencyisremarkableatbasininSouthandNorthShanXi，yetthatiSnotnotableinotherareasTherearemarkednegativecorrelationsbetweenthunderstormanomalyinnorthandtheanomalyofcirculatio

6、n(Uralblockinghigh)inmiddleandhighlatitudeandbetweenthunderstormanomalyinsouthpanandthecircumfluenceanomaly(subtropicalanticycloneinthewestpartofPacificOcean)insubtropicThunderstormdayanomalyoftheNorthregioniSassociatedd